The present investigation describes the results of the performance and the assessment of a combined electrochemical oxygen sensor, equipped with a diffusion barrier and consisted of an electrochemical cell-pump and a potentiometric cell. Both cells of the oxygen sensor are based on the same solid electrolyte, having 0.91ZrO₂ + 0.09 Y₂O₃ composition. More precisely, the sensor consists of: i) an electrochemical cell served for electrochemically pumping-out of oxygen from the sensor chamber, operating as an amperometric sensor and ii) a second electrochemical cell served for measuring the oxygen content in the sensor chamber and operating in potentiometric mode. The analyzed gas is used as the test gas for the second cell, operating under potentiometric regime. The second cell allows studying the sensor’s internal oxygen content as well. The presence of the potentiometric cell increases the reliability of the sensor due to simultaneous measurement of the values of the limiting current in the cell-pump and of the electromotive force in the potentiometric cell. The as fabricated sensor is found to be very effective, providing rapid and accurate response for gas mixtures containing within the range of minimal to nearly 90% (0,8 - 88%) oxygen concentrations at operating temperature values between 400 – 700 °C. The sensor response time at 500 °C does not exceed the 60 seconds. The sensor allows measuring the oxygen diffusion coefficient in nitrogen in a wide range of high temperature values as well.

本研究描述了组合电化学氧传感器的性能和评估结果，该传感器配有扩散阻挡层，由电化学池泵和电位计池组成。氧气传感器的两个电池均基于相同的固体电解质，具有0.91ZrO ₂ + 0.09 Y ₂ O ₃组成。更准确地说，该传感器包括：i）一个电化学电池，用于以电化学方式从传感器室中抽出氧气，用作电流型传感器； ii）第二个电化学电池，用于测量传感器室中的氧气含量并运行在电位模式下。被分析的气体用作第二个电池的测试气体，在电位计下运行。第二个单元格还可以研究传感器的内部氧气含量。电位计电池的存在由于同时测量了电池泵中的极限电流值和电位计电池中的电动势而提高了传感器的可靠性。发现这种组装好的传感器非常有效，在工作温度为400 – 700°C的范围内，对氧气浓度范围最小至近90％（0.8-88％）的混合气体提供快速，准确的响应。500°C下的传感器响应时间不超过60秒。该传感器还可以测量各种高温值下氮中的氧扩散系数。